Friedrich Nietzsche, Human All Too Human (Menschliches, Allzumenschliches), subtitled A Book for Free Spirits (Ein Buch für freie Geister).
First published in 1878. A second part, Assorted Opinions and Maxims (Vermischte Meinungen und Sprüche), was published in 1879, and a third part, The Wanderer and his Shadow (Der Wanderer und sein Schatten), followed in 1880.